联立方程怎么解?273/3100+175/1000+x/2650+y/2700+0.01=1x/(x+y)=0.36请帮我求出X、Y?这是体积法计算配合比.请说明计算过程,谢谢!

Question

联立方程怎么解?
273/3100 + 175/1000 + x/2650 + y/2700 + 0.01 = 1
x / (x+y) = 0.36
请帮我求出X、Y ?这是体积法计算配合比.请说明计算过程,谢谢!

Answer 1

x / (x+y) = 0.36
x=0.36x+0.36y
0.64x=0.36y
x=9y/16
代入273/3100 + 175/1000 + x/2650 + y/2700 + 0.01 = 1
得：273/31+175/10+9y/（16×26.5）+y/27=99
（9*27+424）y/27*424=（310*99-2730+175*31）/310
667y/11448=33385/310
y=（33385/310）*11148/667=1799.95
代入x=9y/16=1012.47